Chapter 5
Measures of Variability

 I. Variance

A. Variance of a Population. . . .

        Deviation Formula



            or

Computational Formula



B. Variance of a Sample. . . . .....Worked Problem

        Deviation Formula



 or

Computational Formula

II. Standard Deviation

A. Standard Deviation of a Population. . . .



 

A. Standard Deviation of a Sample. . . . .....Worked Problem

III.  Visual Summary:  Computational Formulas for the Variance and Standard Deviation

Copyright © 2004 by Mark W. Vernoy